AT&T Wireless AT&T Wireless Today Closed Today Mar 31 Closed Wednesday Apr 1 Closed Thursday Apr 2 Closed Friday Apr 3 Closed Saturday Apr 4 Closed Sunday Apr 5 Closed Monday Apr 6 Closed Map Pin 1156 See Map (253) 939-4675 See Map (253) 939-4675 http://www.smartwireless.com .AT&T Inc. is an American multinational conglomerate holding company headquartered at Whitacre Tower in downtown Dallas, Texas. AT&T is the world's largest telecommunications company